考虑液量变化的深水挥发性油田产量预测方法——以西非尼日尔盆地Akpo油田为例  

A Production Prediction Method Considering the Change of Liquid Production in Deep-Water Volatile Oilfields:A Case Study of Akpo Oilfield in Niger Delta Basin

作　　者：康博韬 顾文欢 肖鹏 郜益华 陈国宁 景至一 KANG Botao;GU Wenhuan;XIAO Peng;GAO Yihua;CHEN Guoning;JING Zhiyi(CNOOC Research Institute Co.Ltd.,Beijing 100028,China;CNOOC International Co.Ltd.,Beijing 100027,China;Energy College,China University of Geosciences(Beijing),Beijing 100083,China)

机构地区：[1]中海油研究总院有限责任公司,北京100028 [2]中国海洋石油国际有限公司,北京100027 [3]中国地质大学(北京)能源学院,北京100083

出　　处：《重庆科技学院学报（自然科学版）》2020年第1期6-10,19,共6页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家科技重大专项“西非、亚太及南美典型油气田开发关键技术研究”(2011ZX05030-005)。

摘　　要：深水挥发性油田生产井见水后液量持续递减,产量预测难度大。结合西非尼日尔三角洲盆地Akpo油田的生产情况,提出了一种考虑液量变化的油田产量预测方法。挥发性油田生产井见水后液量变化明显,预测产量应考虑液量变化带来的影响。深水浊积储层受注采井距大、砂体叠置关系复杂等因素的影响,动态相渗规律能更准确地反映储层中油水运动的规律。通过分析动态相渗规律,定量评价储层油水运动能力的差异;再结合生产井分类研究结果,分析同类生产井的水相运动系数与注采井间不连通系数、储层非均质系数、相对含水上升速度的相关性,建立储层因素与生产动态之间的定量关系,预测不同类型生产井的含水及液量随生产时间的变化规律,从而获得产油量递减变化规律,进而预测确定油田产油量。现场应用结果表明,这种产量预测方法预测精度高且具有较强的可操作性。It is difficult to predict the production of deep-water volatile oilfield because of the continuous decline of liquid volume after water breakthrough.Based on the production data of Akpo oilfield in Niger Delta Basin in West Africa,a particular method of predicting oilfield production considering the change of fluid volume is proposed.The change of liquid quantity is obvious after water breakthrough occurred in the production well of volatile oilfield,and the influence of liquid production should be considered in the prediction of production.Affected by such factors as large injection-production well spacing and complex superposition relation of sand bodies,the law of dynamic relative permeability can more accurately reflect the law of oil-water movement in the deep-water turbidite reservoir.By analyzing the law of dynamic relative permeability,the difference of oil-water movement ability in the reservoir can be evaluated quantitatively.Then,combined with the classification of production wells,the correlation between the coefficient of water phase movement in the similar production wells and the unconnected coefficient of injection-production wells,the heterogeneity coefficient of reservoir and the relative rising rate of water cut is studied.On this basis,the quantitative relationship between reservoir factors and production performance is established to predict the change rule of water cut and liquid production with production time of different types of production wells,so as to obtain the change rule of oil production decline,and predict and determine the oil production of the oilfield.The results of field application show that this method has high precision and strong operability.

关 键 词：挥发性油藏 产量预测方法 浊积储层 水相运动系数 相对含水上升速度 

分 类 号：TE331[石油与天然气工程—油气田开发工程]